Patent Drafting and Prosecution
Expert-defined terms from the Advanced Certificate in Patent Strategy course at London School of Business and Administration. Free to read, free to share, paired with a professional course.
Abstract – Concept #
A concise summary of the invention placed at the beginning of a patent document. Related terms: summary, disclosure. Explanation: The abstract must describe the technical problem, solution, and principal use without revealing unnecessary detail. Example: A 150‑word abstract for a solar‑cell coating. Challenge: Keeping the abstract within the word limit while preserving essential information.
Amendment – Concept #
A change filed by the applicant after the initial submission. Related terms: continuation, restriction. Explanation: Amendments may add, delete, or modify claims, specifications, or drawings to overcome examiner objections. Example: Adding a dependent claim to narrow scope after a rejection. Challenge: Avoiding new matter that could be considered added after the filing date.
Applicant – Concept #
The person or entity that files a patent application. Related terms: inventor, assignee. Explanation: The applicant may be the inventor themselves or a company that owns the rights. Example: A biotech start‑up files on behalf of its research team. Challenge: Determining proper representation and ensuring proper power of attorney.
Articulation – Concept #
The precise wording used in claims to define the invention’s boundaries. Related terms: claim drafting, claim language. Explanation: Clear articulation prevents ambiguity and strengthens enforceability. Example: Using “consisting essentially of” versus “comprising.” Challenge: Balancing breadth with specificity to avoid prior‑art attacks.
Attorney‑in‑Fact – Concept #
A person authorized to act on behalf of the applicant, often a patent attorney or agent. Related terms: power of attorney, representative. Explanation: Must be formally appointed in the office record. Example: A U.S. registered patent attorney representing a foreign applicant. Challenge: Maintaining up‑to‑date authorizations across jurisdictions.
Background – Concept #
Section of the specification that sets the technical field and prior art. Related terms: state of the art, problem statement. Explanation: Provides context but must not disclose the invention itself. Example: Describing existing battery technologies before introducing a new electrolyte. Challenge: Avoiding inadvertent admission of limiting features.
Claim – Concept #
The numbered statements that define the legal scope of protection. Related terms: independent claim, dependent claim. Explanation: Each claim must be supported by the description and drawings. Example: A method claim for “providing a polymeric substrate.” Challenge: Drafting claims that survive novelty and non‑obviousness rejections.
Claim Construction – Concept #
Judicial interpretation of claim language during litigation. Related terms: claim scope, infringement analysis. Explanation: Courts apply the “plain and ordinary meaning” standard. Example: Determining whether a “flexible” component includes a semi‑rigid material. Challenge: Predicting how courts will read ambiguous terms.
Continuation Application – Concept #
A second application filed while the parent is pending, preserving the original filing date. Related terms: continuation‑in‑part, divisional. Explanation: Allows the applicant to pursue alternative claim sets. Example: Filing a continuation to pursue broader claims after a narrow allowance. Challenge: Managing multiple families without duplication.
Continuation‑in‑Part (CIP) – Concept #
An application that adds new subject matter while retaining the original filing date for common parts. Related terms: continuation, priority. Explanation: New material receives a later effective date. Example: Adding an improved catalyst to a previously filed composition. Challenge: Ensuring the new matter is properly distinguished from the original.
Divisional Application – Concept #
A patent filed from a parent application to protect distinct inventions disclosed in the original filing. Related terms: restriction requirement, unity of invention. Explanation: Issued when the examiner cites lack of unity. Example: Splitting a multi‑component device into separate applications. Challenge: Coordinating prosecution timelines for each division.
Drawings – Concept #
Visual representations required to illustrate the invention. Related terms: figures, schematic. Explanation: Must be referenced in the specification and enable the invention. Example: A cross‑sectional diagram of a microfluidic chip. Challenge: Meeting the formal requirements of line thickness, shading, and labeling.
Enablement – Concept #
Requirement that the specification teach a person skilled in the art how to make and use the invention without undue experimentation. Related terms: written description, sufficiency of disclosure. Explanation: Failure leads to a rejection under 35 U.S.C. 112(a). Example: Providing detailed synthesis steps for a novel compound. Challenge: Balancing detail with trade‑secret protection.
Examination – Concept #
The process by which a patent examiner evaluates patentability. Related terms: office action, prosecution. Explanation: Includes search, analysis of novelty, non‑obviousness, and compliance with formalities. Example: Receiving a non‑final office action citing prior art. Challenge: Responding effectively within statutory deadlines.
Ex parte Examination – Concept #
A unilateral examination where only the applicant communicates with the examiner. Related terms: inter partes, opposition. Explanation: Common in the United States, where third parties may submit prior art but do not participate further. Example: Filing a response to an office action without an adversarial hearing. Challenge: Anticipating third‑party submissions.
Extension of Time – Concept #
Request to delay a deadline in prosecution. Related terms: fee waiver, petition. Explanation: Must be filed under the applicable rules (e.g., 37 CFR 1.136). Example: Requesting a three‑month extension to answer a non‑final action. Challenge: Paying increased fees and providing sufficient justification.
First‑to‑File – Concept #
Patent system principle awarding rights to the first applicant to file, not the first to invent. Related terms: priority, grace period. Explanation: Adopted by most jurisdictions since the WTO TRIPS Agreement. Example: Filing a provisional application to secure an early filing date. Challenge: Maintaining a disciplined filing schedule worldwide.
Grace Period – Concept #
A limited time after public disclosure during which filing a patent application is still possible. Related terms: first‑to‑file, prior art. Explanation: Varies by jurisdiction (e.g., 12 months in the U.S., none in Europe). Example: Filing within six months of a conference presentation. Challenge: Managing disclosures to avoid losing rights abroad.
Invention Disclosure – Concept #
Internal document summarizing an invention for evaluation before filing. Related terms: technology transfer, docket. Explanation: Used by corporations to assess commercial potential and decide on filing. Example: A standard form capturing inventors, summary, and prior art. Challenge: Ensuring completeness and timely submission.
Inventor – Concept #
The individual(s) who conceived the subject matter of the invention. Related terms: applicant, assignee. Explanation: Must be correctly named; errors can lead to invalidity. Example: Listing three researchers as co‑inventors on a biotech patent. Challenge: Determining inventorship when contributions are collaborative.
International Search Report (ISR) – Concept #
A document produced by the International Searching Authority (ISA) under the PCT, listing relevant prior art. Related terms: PCT, written opinion. Explanation: Helps applicants assess patentability before entering national phases. Example: An ISR citing 15 documents for a nanomaterial invention. Challenge: Interpreting the relevance of each cited reference.
International Preliminary Examination Report (IPER) – Concept #
Optional report from the International Preliminary Examining Authority (IPEA) providing a non‑binding opinion on patentability. Related terms: PCT, written opinion. Explanation: Used to amend claims before national phase entry. Example: Receiving a favorable IPER that encourages filing in Europe. Challenge: Timing the request to avoid unnecessary expense.
International Publication (WO) – Concept #
The publication of a PCT application 18 months after the priority date. Related terms: PCT, prior art. Explanation: Becomes prior art for later filings worldwide. Example: WO 2023/123456A1 published online. Challenge: Managing global disclosure strategy to protect downstream filings.
Jurisdiction – Concept #
The geographic area where a patent office has authority to grant patents. Related terms: national phase, territorial rights. Explanation: Patent rights are enforceable only within the granting jurisdiction. Example: Filing in USPTO, EPO, JPO. Challenge: Coordinating parallel prosecution across multiple jurisdictions.
Kelley‑Murray Test – Concept #
A U.S. Supreme Court test for determining whether a claim is directed to patent‑eligible subject matter. Related terms: abstract idea, patent eligibility. Explanation: Involves a two‑step analysis: identify abstract concept, then examine additional elements. Example: Applying the test to a software‑based data‑processing claim. Challenge: Drafting claim language that survives the test.
Legal Basis – Concept #
The statutory provision(s) under which a patent is sought. Related terms: 35 U.S.C., EPC. Explanation: Determines the applicable requirements and procedures. Example: Citing 35 U.S.C. 101 for subject‑matter eligibility. Challenge: Aligning drafting with differing legal bases across regions.
Markush Group – Concept #
A way of claiming a group of chemical compounds using a generic formula. Related terms: chemical claim, generic structure. Explanation: Enables broad coverage of related molecules. Example: Claiming “a compound selected from the group consisting of A, B, and C.” Challenge: Ensuring each member is adequately disclosed and enabled.
MPEP (Manual of Patent Examining Procedure) – Concept #
The USPTO’s internal guide for examiners and practitioners. Related terms: examiner guidance, procedural rules. Explanation: Provides detailed rules on claim interpretation, amendment practice, and appeal. Example: Consulting MPEP § 2113 on written description. Challenge: Keeping abreast of updates and applying them correctly.
Non‑obviousness – Concept #
The requirement that an invention must not be obvious to a person of ordinary skill in the art (patentability criterion). Related terms: inventive step, obviousness rejection. Explanation: Evaluated using the Graham factors (scope of prior art, differences, level of skill, etc.). Example: Demonstrating unexpected thermal stability to overcome an obviousness rejection. Challenge: Providing objective evidence (e.g., secondary considerations).
Objection – Concept #
An examiner’s formal statement indicating a deficiency in the application. Related terms: office action, rejection. Explanation: May be a rejection, requirement for amendment, or a request for clarification. Example: An objection to claim language as indefinite under 35 U.S.C. 112(b). Challenge: Responding promptly with persuasive arguments.
Office Action – Concept #
The written communication from the examiner detailing objections and/or rejections. Related terms: response, prosecution. Explanation: Can be “non‑final” or “final.” Example: Receiving a non‑final action citing prior art under 35 U.S.C. 102. Challenge: Crafting a comprehensive response that addresses all points.
Opposition – Concept #
A post‑grant proceeding where third parties can challenge the validity of a granted patent. Related terms: post‑grant review, revocation. Explanation: Common in Europe (EPO opposition) and some Asian offices. Example: Filing an opposition within nine months after grant in the EPO. Challenge: Preparing a robust defense and monitoring deadlines.
Patent Cooperation Treaty (PCT) – Concept #
An international treaty facilitating a unified filing procedure for multiple jurisdictions. Related terms: international phase, national phase. Explanation: Provides a single “PCT application” that can later enter over 150 national phases. Example: Filing a PCT to protect an AI algorithm worldwide. Challenge: Managing the timing of national phase entries and associated costs.
Patent Family – Concept #
A set of patent documents that protect the same invention in different jurisdictions or at different stages. Related terms: continuation, priority family. Explanation: Includes PCT applications, national filings, continuations, and divisionals. Example: A family comprising a US utility patent, a European patent, and a Japanese patent. Challenge: Tracking status across multiple offices.
Patent Litigation – Concept #
Legal proceedings to enforce or defend patent rights. Related terms: infringement suit, declaratory judgment. Explanation: May involve infringement, validity, or enforceability disputes. Example: Filing a suit in the Eastern District of Texas for alleged infringement. Challenge: High costs and uncertainty of outcomes.
Patent Prosecution Highway (PPH) – Concept #
A fast‑track program that allows accelerated examination in a second office based on a favorable ruling in a first office. Related terms: accelerated examination, PPH program. Explanation: Requires a “positive” claim allowance or a “non‑final” action with a strong argument. Example: Using the USPTO‑Japan PPH to obtain rapid allowance in Japan. Challenge: Meeting strict eligibility criteria and synchronizing filings.
Patent Troll – Concept #
A pejorative term for entities that acquire patents primarily to enforce them via litigation, without producing products. Related terms: non‑practicing entity, NPE. Explanation: Often target small companies for settlements. Example: An NPE suing a startup for alleged infringement of a software patent. Challenge: Defensive patent strategies and cost‑effective settlements.
Patentability Search – Concept #
A search conducted to assess whether an invention is novel and non‑obvious before filing. Related terms: prior art search, freedom‑to‑operate. Explanation: May be “novelty‑only” or “comprehensive.” Example: Conducting a search in USPTO, EPO, and WIPO databases for a new polymer. Challenge: Ensuring thoroughness while controlling search costs.
Patent Term – Concept #
The period during which a granted patent is enforceable. Related terms: term extension, maintenance fees. Explanation: Typically 20 years from the earliest filing date, with possible extensions for pharmaceuticals. Example: A US utility patent expiring in 2035. Challenge: Paying maintenance fees to keep the patent alive.
Patentability – Concept #
The overall assessment of whether an invention meets statutory requirements for patent grant. Related terms: novelty, inventive step. Explanation: Involves analysis of novelty, non‑obviousness, utility, and statutory subject matter. Example: Concluding an invention is patentable after a favorable examiner’s opinion. Challenge: Aligning the invention with differing national standards.
Patent Agent – Concept #
A professional authorized to practice before a patent office, but not necessarily a licensed attorney. Related terms: patent attorney, representative. Explanation: Must pass the patent bar exam and maintain good standing. Example: A registered patent agent drafting claims for a client. Challenge: Recognizing jurisdictional limits (e.g., agents cannot represent in court).
Patent Examiner – Concept #
The USPTO or equivalent official who evaluates patent applications for compliance with legal standards. Related terms: examiner interview, examiner’s amendment. Explanation: Uses classification systems and prior‑art databases to assess patentability. Example: Examiner cites a prior art reference and issues a rejection. Challenge: Building a rapport and understanding examiner’s reasoning.
Patent Portfolio – Concept #
A collection of patents owned by a single entity. Related terms: asset management, licensing. Explanation: Used strategically for blocking competitors, cross‑licensing, and valuation. Example: A pharmaceutical company’s portfolio of 150 patents covering a drug class. Challenge: Regularly pruning weak patents and aligning with business goals.
Patent Prosecution – Concept #
The procedural steps taken from filing to grant (or abandonment) of a patent. Related terms: examination, amendment. Explanation: Includes filing, responding to office actions, interviews, and appeals. Example: A three‑year prosecution timeline culminating in allowance. Challenge: Managing deadlines, costs, and strategic claim amendments.
Patent Strategy – Concept #
The overarching plan for obtaining, maintaining, and leveraging patent rights. Related terms: IP management, market positioning. Explanation: Involves decisions on filing routes, claim scope, and enforcement. Example: Choosing to file a PCT followed by continuations in key markets. Challenge: Balancing breadth of protection with budget constraints.
Patent Term Extension (PTE) – Concept #
Additional protection period granted for certain regulated products, primarily pharmaceuticals. Related terms: Supplementary Protection Certificate, regulatory review. Explanation: Calculated based on the time taken for regulatory approval. Example: A US PTE adding five years to a drug patent. Challenge: Navigating complex filing requirements and deadlines.
Prior Art – Concept #
All information made available to the public before the filing date that can affect patentability. Related terms: novelty, obviousness. Explanation: Includes patents, publications, products, and public use. Example: A conference paper published six months before filing. Challenge: Conducting exhaustive searches to uncover hidden prior art.
Priority Claim – Concept #
A request to treat a later application as having the same filing date as an earlier one. Related terms: priority date, Paris Convention. Explanation: Allows preservation of the earliest effective date across jurisdictions. Example: Claiming priority from a US provisional filing for a subsequent PCT. Challenge: Ensuring the priority document fully supports the later claims.
Provisional Application – Concept #
A U.S. filing that secures a filing date without a formal patent claim set. Related terms: priority, non‑provisional. Explanation: Provides 12 months to file a regular utility application. Example: Submitting a provisional for a novel sensor design. Challenge: Drafting sufficient disclosure to support later claims.
Public Disclosure – Concept #
Any act that makes an invention available to the public, such as publication, presentation, or sale. Related terms: prior art, grace period. Explanation: May create a bar to patentability in jurisdictions lacking a grace period. Example: Publishing a research article before filing. Challenge: Coordinating disclosures with filing schedules.
Qualified Electronic Signature (QES) – Concept #
A digital signature meeting the EU’s eIDAS requirements, used for filing electronic patent documents. Related terms: e‑filing, digital authentication. Explanation: Provides legal equivalence to a handwritten signature. Example: Using a QES to submit an EPO application. Challenge: Maintaining secure key storage and compliance with national regulations.
Reexamination – Concept #
A post‑grant proceeding where the patent office re‑examines the validity of a granted patent. Related terms: re‑issue, post‑grant review. Explanation: Can be initiated by the patent holder or a third party. Example: Requesting reexamination due to newly discovered prior art. Challenge: Managing potential narrowing of claims.
Reference Citation – Concept #
A prior‑art document cited by an examiner or applicant during prosecution. Related terms: prior art, examiner’s citation. Explanation: May be used to argue novelty or obviousness. Example: Citing WO‑2021/098765 as a reference in an office action. Challenge: Distinguishing between material that is truly anticipatory versus merely similar.
Restriction Requirement – Concept #
An examiner’s demand that an application be limited to a single invention. Related terms: unity of invention, divisional. Explanation: Based on the “single general inventive concept” rule. Example: Receiving a restriction requirement to split a device and a method into separate applications. Challenge: Deciding which invention to pursue first.
RCE (Request for Continued Examination) – Concept #
A U.S. procedural tool to reopen prosecution after a final office action. Related terms: continuation, appeal. Explanation: Allows further amendment of claims without filing a continuation. Example: Filing an RCE to overcome a final rejection on claim 1. Challenge: Paying additional fees and managing the extended timeline.
Scholarly Prior Art – Concept #
Academic publications that constitute prior art. Related terms: journal article, conference paper. Explanation: Must be publicly accessible and enable the invention. Example: A 2022 IEEE paper disclosing a similar algorithm. Challenge: Identifying obscure or non‑English sources.
Search Report – Concept #
A document listing prior art found during the examiner’s search. Related terms: ISR, examiner’s search. Explanation: Forms the basis for initial rejections. Example: A search report citing three US patents and two foreign publications. Challenge: Interpreting the examiner’s relevance arguments.
Specification – Concept #
The written description, including background, summary, detailed description, and claims. Related terms: description, disclosure. Explanation: Must satisfy enablement, best mode, and written‑description requirements. Example: A 30‑page specification for a nanocomposite material. Challenge: Drafting concise yet comprehensive language.
Statutory Subject Matter – Concept #
Categories of inventions that are eligible for patent protection under law (e.g., processes, machines, compositions). Related terms: 35 U.S.C. 101, abstract idea. Explanation: Excludes laws of nature, natural phenomena, and abstract ideas. Example: Claiming a method of data compression, which is statutory. Challenge: Avoiding language that triggers eligibility rejections.
Supplementary Protection Certificate (SPC) – Concept #
An extension of patent protection for medicines and plant protection products in Europe. Related terms: PTE, regulatory approval. Explanation: Provides up to five additional years of exclusivity. Example: Obtaining an SPC for a new antibiotic. Challenge: Meeting the stringent linking and filing criteria.
Systematic Search – Concept #
A methodical approach to locating prior art using classified databases and keyword strategies. Related terms: keyword search, classification search. Explanation: Increases the likelihood of uncovering relevant references. Example: Conducting a CPC‑based search for “C07D 503/12” to find similar compounds. Challenge: Balancing breadth and depth to avoid information overload.
Technical Effect – Concept #
The functional result achieved by the invention, often used to support inventive step arguments. Related terms: advantage, unexpected result. Explanation: Demonstrates that the invention provides a benefit beyond prior art. Example: Showing a 30 % increase in battery capacity as a technical effect. Challenge: Providing experimental data to substantiate the claim.
Third‑Party Observation – Concept #
A submission by a non‑applicant that presents prior art or arguments during examination. Related terms: pre‑grant opposition, public participation. Explanation: Accepted in many jurisdictions (e.g., EPO, USPTO). Example: A competitor filing observations for a pending European application. Challenge: Responding to unsolicited arguments while maintaining a consistent prosecution strategy.
Utility Model – Concept #
A form of protection similar to patents but with a shorter term and less stringent examination, common in certain jurisdictions. Related terms: short‑term patent, innovation. Explanation: Often granted for incremental improvements. Example: Filing a utility model in Germany for a new fastener design. Challenge: Limited enforceability and lower commercial value.
Validity – Concept #
The legal standing of a granted patent, indicating it meets all statutory requirements. Related terms: invalidity, enforceability. Explanation: Can be challenged in court or through post‑grant proceedings. Example: A court upholding the validity of a patent after an infringement suit. Challenge: Anticipating potential invalidity arguments.
Written Description – Concept #
Part of the specification that must fully describe the invention so that one of ordinary skill can recognize it as the inventor’s contribution. Related terms: enablement, disclosure. Explanation: Separate from enablement; focuses on the inventor’s possession of the invention at filing. Example: Providing specific structural formulas for a series of compounds. Challenge: Avoiding overly broad language that may be deemed insufficient.
Yield – Concept #
The amount of product obtained from a chemical process, often used as a metric in patent claims. Related terms: efficiency, reaction yield. Explanation: May be claimed as a performance parameter. Example: Claiming a synthesis method that yields >80 % of the target molecule. Challenge: Demonstrating reproducibility and avoiding over‑promising results.
Zero‑Day Filing – Concept #
An immediate filing strategy to secure a priority date as soon as an invention is conceived. Related terms: rapid filing, provisional. Explanation: Minimizes the risk of public disclosure before filing. Example: Submitting a quick provisional application within 24 hours of lab discovery. Challenge: Ensuring the provisional contains sufficient detail to support later claims.